JVC TH-A75R Service Manual page 26

TH-A75R
4.10 BA6664FM-X (IC251) : Motor driver
• Pin layout
NC
A3
NC
A2
NC
NC
A1
GND
H1+
H1-
H2+
H2-
H3+
H3-
• Block diagram
1-26 (No.21189)
1
28 RNF
2
27 VM
3 26 GSW
4
25 Vcc
5
24 FG
6
23 PS
7 22 EC
29 30
8 21 ECR
9
20 FR
10
19 FG2
11
18 SB
12 17 CNF
13
16 BR
14
15 VH-
DRIVER
A3
2
A2
CONTROL
4
A1
TL
7
HALL AMP
GND
+
8
-
H1+
9 +
-
H1-
10
+
-
H2+
11 +
-
H2-
12
+
-
H3+
13
+
-
H3-
14
TSD
GAIN
SWITCH
GAIN
CURRENT
+ -
SENSE AMP
PS
TOROUE
SENSE AMP
+
-
VCC
R
D Q
SHORT BRAKE
CK Q
BRAKE MODE
Hall Bias
R
NF
28
VM
27
GSW
26
VCC
25
VCC
FG
24
PS
23
EC
22
ECR
21
VCC
FR
20
FG2
19
SB
18
CNF
17
BR
16
VH
15